<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<script src="node_modules/vue/dist/vue.js"></script>
<body>
<div id="app">
    <h2 >哈哈多少岁：{{name}}</h2>
</div>

<script>
    const app = new Vue({
            el: "#app",
            data: {
                name:"12"
            },

        }
    );
</script>
</body>
</html>